Garbage destructor



Dec, 25, 1923, 1 1,478,875

I H. T. LUDWIG GARBAGE DESTRUC TOR Filed Jan. 24, 1922 4 Sheets-Sheet 1 1,478,875" H. T. LUDWIG GARBAGE DES TRUCTOR Filed Jan. 24. 1922 4 Sheets-Sheet 2 Dec. 25, 1923.

H. T. LUDWIG GARBAGE DESTRUCTOR Filed Jan. 24 1922 4 Sheets-Sheet 5 IN VEN TOR. warn rflzuawz'y Dec. 25, 1923.

' 1,478,875 H. T. LUDWIG GARBAGE DESTRUCTOR Filed Jan. 24 1922 4 Sheets-Sheet 4 I N VEN TOR.

Patented Dec. 25, 1923.

HERMAN '1. LUDWIG, OF SAN FRANCISCO, CALIFORNIA.

GARBAGE DESTRUCTOB.

Application flied January 24, 1922.- Serial No. 531,371.

To all whom it may concem:

Be it known that I, HERMAN T. Lrmwre, a citizen of the United States, residing at San Francisco, in the county of San Fran cisco, State of California, have invented a.

new and useful Garbage Destructor, of which the following is a specification, in such full and clear terms as will enable those skilled inthe art to construct and use the same.

This invention relates to a garbage incinerator and its object is to produce an ap paratus capable of destroying a great uan-v 5 be injured b the expansion due to heating.

, Another 0 ject of the invention isto arrange the 'fire brick lining at such a distance from the structure of the stack as to allow the free circulation of air to cool the fire brick and the structure, the heat thus collected being used to aid in drying the fresh supplyof garbage. 1

Another object of the invention is to provide means for examining the grate vbars at four places, thereby making replacements eas when re uired. I

other ob ect of the invention is to pro vide means whereby the producer gas formed may be taken oil the stack when it is desired to make use of that gas for heating boilers, etc.

Other objects of "the invention will appear as the description proceeds.

An embodiment of the invention is shown in the accompanying drawings in which the same reference numeral is applied to the same ortion throughout, but I am aware that t ere may be modifications thereof.

Fig. 1 is a side elevation partly in section ofthe complete apparatus.

Fig. 2 is a plan view of the complete apparatus.

Fig. 3 is a plan view in section of a portion of the stack and platform on a larger scale than Figure 2. 3

Fig. 4 is a vertical sectional view of the complete apparatus, and

Fig. 5 is a plan view of the stack just above the grate.

The structure consists of a reinforced concrete octagonal stack 1 from about eight to sixteen feet across with a working floor 2 from twelve to sixteen feet above the general ground level.

Inside the lower portion of the stack there is an extra curtain wall 3 through which an opening-is cut to operate the car 4 on the tracks 5.

Inside the stack the floor slopes to the central opening 6 as indicated at 7. On four sides of the stack are four hoods or enclosures 8', the ends of which are closed by' four doors 9 to 12 inclusive for each enclosure. There are six girders 13 to 18 inclusive which extend into said enclosures and form 'the supports for the grate bars 19, said bars being. all of substantially the same length and being interchangeable. The ashes collect on the grate bars and they are worked down by an attendant with a rake bar operating through the doors 9 to 12 on whichever side of the stack may be required. Such ashes as the workman may be compelled to work out through the doors 9 to 12 he will wheel around the stack on the platform 2 and dump into the car 20 below the opening 21.

\ Inside the stack there are five reinforced concrete rings 22 at different levels, each supported at a short distance from the outer stack by a plurality of haunches 23 whereby an air space is left substantially all the way around each ring except under each of the working enclosures. The space between the fire brick 25 and the main wall 1 of the stack. is not air tight and the main wall must have openings at convenient laces to allow the fan 43 to keep the fire rick at as low a temperature as possible, however, the fire brick linin 25 to 28 inclusive are made as nearly air tight as possidible. One such opening is indicatedat 28',

ig. 4. These ring girders 22 form the su ports for each set of fire bricks 24 to 28 inc usive.

The bricks are laid to form a circular stack,

with an air space entirel around the stack. In order to protect the ring girders 22 from the heat, the bricks of the lower set are corbelled in and then extended up above the top of each ring girder, thereby preventing it from being unduly heated and at the same time providing means toallow the bricks to expand without injury to the structure, since the expansion due to the greatest heat may be divided up among a plurality of separate units.

A flue 29 and hinged cap 30, the latter operated by an arm 31 and cable 32 serve to send the producer gas to any place where it may be used whenever desired. A grill brick work top 33 allows the air to pass into the stack when running without burning all of the gas at the stack.

Adjacent the stack the-floor 2 is supported by suitableposts 34 also in turn supporting other floors 35, 36 and an inclined floor 37. Stairways 38 to 41 afford means to reach different levels of the stack floors.

From the stack to the lower portion of the incline 37 there is a reinforced concrete air conduit 42 through which a fan 43' of any type suitable to the work delivers the air drawn from around the outside of the fire brick to the drying tunnel covered by the roof 44, Y

An endless conveyor 45 extends up the incline and is driven by the motor 46. The material taken to the top of the incline is dropped into the stack through an opening .47. At the lower end of the incline the conveyor 45 runs under a bin 49 and receives material from the discharge chute 50. The

bin is filled, from a bucket 51 moved up the guides 53 by the r-am 52. lVagons collect the garbage and dum it into the bucket 51.

The operation of t e apparatus is as follows: Assuming the wagons to dump the garbage from an suitable roadway onto the inclined plat orm 53' which directs it into the bucket 51, which is raised and the garbage dumped into the bin 49 from the ucket the endless conveyor 45 carries it to the top of the incline and dumps it into the stack.

When the fire is to be started, a considerable quantity of fuel is lp laced in the stack onthe grate bars 19. hereafter garbage is dumped upon the fuel until a considerable quantity has collected, thereupon the fire is started and following that an endeavor is made to supply .the stack with.

garbage in sufiicient quantity to keep it burning at all times, the rapidity of burningbemg somewhat regulated by the rate of o eration of the fan 43.

en the fire is started the fan 43 is operated to draw air from the upper portion of the stack outside the fire brick lining downwardly driving it through the tunnel 42 to theincline 37 by which the garbage is carried. The heat accumulated in the passage of the air down the stack is made use of to dry the garbage and present it to the furnace in a better condition to burn.

'hen conditions are right provision may be made for the opening of a valve 54 in the top of the incline 44 to permit the esca of air therefrom, and to accumulate t e producer gas in any suitable location, such producer gas as may be formed passes off through the flue 29, the top 30 being closed;

\Vhe'n the burning conditions are .not-

vbe thrown into the opening 6 onto the ear 4,

while other rtions will be wheeled-along to the opening 21 and dumped into the car 20. i

What I claim is as follows, but various modifications may be made in the construction shown in the drawings and above particularly described form within the pur View of my invention.

' 1. In a garbage destructor a vertical stack, a fire brick lining for the stack spaced therefrom, grate bars at the bottom of the stack for holding the weight of material piled therein, a fan for (causing a downdraft in the stack outside the fire brick lining, a carrier for delivering garbage to the top of the stack, a conduit extending from the fan to said carrier for the delivery of hot air to the garbage to dry the same prior to its delivery to the stack, and a plurality of doors at the level of the grate bars for the removal of the ashes. 1

2. In a garbage destructor a stack, a plurality of grate bars at the bottom of the spaced fromthe stack to provide air cooling places entirely around the fire brick lining, an inclined chute, a carrier in said chute .for delivering the garbage to the to of the stack, a fan for creating a down dra t in that portion inthe stack outside the fire brick lining, and a passage extending from said fan to the lower portion of the chute for delivering hot air to the garbage being elevated to the top of the stack whereby the garbage may be dried.

3. n a garbage destructor, a vertical stack, a fire brick lining therein, spaced therefrom, grate bars at the bottom of the stack for holding the weight of material top of the stack, and a conduit for deliverpiIed therein, doors on four sides of said ing the air from the fan to the garbage carstack at the level of-the grate bars for the rier to dry the garbage.

I removal of the ashes, therefrom, a fan for In testimony whereof I have hereunto set 5 causing a down-draft through the stack outmy hand this 16th day of January,

side'the firebrick, a carrier for delivering A. D., 1922. garbage from the level of the ground to the HERMAN T. LUDWIG. 

